How To Build An Off Grid Gravity Fed Water System Cheaply

An off grid Gravity Fed Water System is a great option for running water. Since many of us off grid dwellers and tiny house owners do not have running water. Yes, you can live without running water. Indoor plumbing has been around a long time but mostly for the wealthy. Your average 16th century English Farmer would have to carry in water. The same still holds true for many parts of the world today.

The system I’m going to show you how to build is not a whole house solution. The principles will scale up, though. This is a cheap and easy solution to get a gravity fed water system for a sink. So this is perfect for doing a few loads of dishes, brushing teeth or hand washing.

Best of all this build is both easy and cheap. I built the system in just a few minutes. I spent the next few days tinkering with it to try to optimize it.

Off Grid Gravity Fed Water System — The Parts

Parts

Five Gallon Bucket With Lid
Tubbing
Threaded PEX connector
Threaded PVC Piece
Rubber Washer
Hose Clamps That Fit The PEX Connector.
Faucet Connector
PEX Faucet Shut Off

Some of the parts listed are not specific. Therefore they will vary based on your needs and availability. You can do like I did and stand in the plumbing section of Lowe’s for an hour trying pieces for a fit. Unless you are going to be reducing it’s best to get tubing the same size as your PEX connectors. I believe the tubing I used was 3/8th. That was a very snug fit on the faucet shut-off connector.

You could also just go into the local hardware store and ask for help. If you get a smart employee, yes it happens sometimes, you can be out quickly. Just tell them you’re looking to hook up a hose to a five-gallon bucket.

Gravity Fed Water System — Drilling the hole

Building The Bucket

Use a paddle bit to drill a hole the size of your threaded piece. In my case, this was 3/8th size hole. Be careful not to let the bit dance. If you do the hole will be bigger than the connector. Also, Plumbers tape will help to a degree.

I had to get a pvc piece that was female on one side and male on the other. Put Teflon tape on the PEX piece and screw into the female side. Use Teflon tape on the male side. Put a rubber washer on.

For inside the bucket, I had a female threaded open piece.

Thread the male connector into the bucket. It should be a tight fit. You want the piece to go all the way into the bucket for the washer to prevent leaks.

On the inside of the bucket, I put another rubber washer on threaded side. That way there is a washer on the inside and outside of the bucket to prevent leaks.

Thread the open female piece on the inside of the bucket. Tighten it as snuggly as you can by hand. Using a wrench would break something for sure.

Preparing The Line

At this point, it’s best to place the bucket where you are going to want it. Take the tubing you have and place on one of your hose clamps. Work the tubing onto the PEX barbed end on the bucket. It will be a really tight fit. This is what we want. When the tubing is all the way on, move the hose clamp to the center of the barb. Tighten the hose clamp. Don’t go crazy tightening it down, you don’t want to crack the PEX barb.

Run the tubing to the sink. It will most likely be too long. I didn’t want to have excess tubing congesting my Gravity Fed Water System. The less distance it travels will help with the pressure. Cut it to be just enough to reach the sink.

Nest put a hose clamp on the tubing and attach to the shut-off valve. And the Shut off piece connects to the faucet connector and that screws onto the sink.

Set Up

At this point, everything should be hooked up for your Gravity Fed Water System. Since this is only going to feed the cold water tap on the faucet. Don’t forget to either plug or shut off the hot water side. I used a faucet connector and shut off valve on it. Therefore the water will just pour out. Ask me how I know.

Now fill the bucket with water. Check for leaks. Also you could use silicone to seal the connector coming out of the bucket. I have not had it leak in weeks of use, though.

Then turn on you shut off valve to the faucet. Check for leaks. If no leaks turn on the faucet. Remember only the cold will work. If water comes out awesome you did it! In the event that the water won’t flow it has air in the line. So we have to get the air out of the line first.

Also you could install a check valve to get the air out. I just squeezed the tubing near the bucket. When you squeeze the tubing it forces the air inside the bucket and fills the line with water. Once the line is completely filled with water it will flow.

Off Grid Running Water Gravity Fed Water System — Off Grid Running Water

Conclusion

In conclusion, I have been without running water for almost 2 years, living in my tiny house. It isn’t that bad honestly. In particular many things you take for granted are made difficult. Like doing the dishes. So you can’t just rinse off something. The first thing I did after building my Gravity Fed Water System was to do some dishes. Finally It felt great to have running water to do dished with.

I fiddled around trying to get the water pressure to be better with no luck. Also don’t expect any great water pressure. It will flow steadily. But it will flow.

This project cost less than $30 and took less than an hour. As a result, I can turn a faucet and water comes out. For a short term disaster or for those that live off the grid this is a cheap and easy solution. So the next step from this system is rain catchment and a water pump. You could possibly do that for $100. Probably not, though. As an interim to that, this Gravity Fed Water System fills the gap perfectly.

What do you do for water? Have you built a Gravity Fed Water System? Let me know in the comments!

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